JPH0741298B2 - Ring piston position detector incorporated in rolling mill roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to the position of a ring piston incorporated in a roll for a rolling mill, particularly the position of the ring piston on the inner side in the axial direction in a ring piston fitted in a plurality of stages in the axial direction of the roll. The present invention relates to a device for detecting.

[Prior Art] In recent years, various rolling means have been proposed in order to perform good rolling on a rolling mill of any strip width, and one of them is to use a sleeve on a roll core. A liquid-tight chamber is formed between the end of the roll core and the end of the sleeve by fitting, a tapered surface is formed on at least one of the facing surfaces of the both ends, and a ring piston is provided between the facing surfaces. Using the fitted roll as a rolling mill roll, the ring piston is moved in the axial direction to expand and contract the sleeve end portion in the radial direction to change the roll profile into a desired shape and perform rolling. A rolling mill that has been proposed is proposed.

Thus, in a rolling mill using the above-mentioned rolling mill rolls, in order to control the roll profile to a desired shape, it is necessary to detect the axial position of the ring piston, and in particular, in a plurality of stages in the axial direction. In a system that includes a ring piston and performs more accurate and wide-range control of the roll profile, it is necessary to accurately detect the axial position of each ring piston.

[Problems to be Solved by the Invention] However, conventionally, detection of the axial position of the ring piston is
Normally, it is performed by detecting the hydraulic pressure of the hydraulic circuit for driving the axial movement of the ring piston,
The frictional force between the ring piston, the roll core, and the sleeve is liable to change unstablely. Therefore, it is not known whether the ring piston is moving according to the hydraulic pressure. In this case, the actual position of the axially inner ring piston could not be confirmed.

The present invention was made by focusing on the above-mentioned conventional problems,
An object of the present invention is to provide a device for accurately detecting the axial position of the ring piston on the inner side in the axial direction in a profile variable roll including a plurality of stages of ring pistons.

[Means for Solving the Problems] The present invention has been made in order to solve the above technical problem, and includes a roll core body, a sleeve fitted to the roll core body, the roll core body and the sleeve. In a device in which a plurality of stages of ring pistons movable in the roll axis direction are fitted into a liquid-tight chamber formed by a seal ring provided between outer end portions of the inner ring piston And a movable rod adapted to move in the roll axis direction integrally with the seal rod, and an inner piston position detection sensor for detecting the position of the movable rod in the roll axis direction is provided in the seal ring. The present invention relates to a position detecting device for a ring piston incorporated in a roll for a rolling mill.

[Operation] Therefore, in the present invention, the position of the inner ring viston in the roll axial direction can be directly detected through the moving rod that penetrates the outer ring piston.

[Examples] Examples of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the present invention, in which a sleeve 2 is fitted on the outer periphery of a roll core 1 and an annular space having a tapered surface 3 between the ends of the roll core 1 and the sleeve 2 is formed. Formed,
In addition, two-stage ring pistons 4 and 5 each having a tapered surface matching the tapered surface 3 are fitted inside and outside the space, and further screwed into a screw 6 formed on the inner surface of the end portion of the sleeve 2. A seal ring 7 is provided to form a liquid tight chamber.

Further, between the seal ring 7 and the outer piston 5, inside,
Oil chambers 8, 9, 10 are formed between the outer ring pistons 4 and 5 and at the tip of the inner ring piston 4 so as to guide the working oil through an oil passage in the roll core 1 (not shown). .

In the inside of the outer ring piston 5 having the above-described structure, the moving rod 11 is provided at a plurality of circumferentially equidistant positions (for example, four places) at equal intervals, and the inner end head portion of the moving rod 11 is provided.
12 is configured to be constantly pressed against the outer end surface of the inner ring piston 4 via a pressing spring 13 provided between the outer ring piston 5 and each of the outer end portions of the moving rod 11, and a detent screw 14 is provided. The ring plate 15 is fixed therethrough. Reference numerals 16 and 17 in the figure denote guide holes for allowing and guiding the head portion 12 and the ring plate 15 in the axial direction.

Further, for example, magnetic rods 18 are pressed against the outer surface of the ring plate 15 at a plurality of circumferential positions (for example, two positions separated by 180 °) inside the seal ring 7,
An inner piston position detection sensor 19 is provided which detects the position of 15 by a detection coil (not shown). 20 in the figure
Is pressed against the outer end surface of the outer ring piston 5 at two positions (180 °) in the ring plate 15 which are different in 90 ° direction from the inner piston position detection sensor 19 and directly in the axial direction of the outer ring piston 5. 3 shows an outer piston position detection sensor provided to detect position.

In the above structure, when the axial position of the inner ring piston 4 changes, the moving rod 11 pressed against the outer end surface of the inner ring piston 4 by the pressing spring 13 moves integrally with the inner ring piston 4 and further moves. Rod 11
An inner piston position detection sensor 19 which moves integrally with the ring plate 15 fixed to the inner ring piston 15 and presses the outer end surface of the ring plate 15 to detect its position, directly detects the axial position of the inner ring piston 4. can do.

FIG. 2 shows another embodiment of the present invention.
The inner ring piston 4 and the moving rod 11 are moved integrally by fitting and fixing the head portion 12 'of the inner ring piston 4 in the connecting groove 21 formed on the outer surface of the inner ring piston 4. Other configurations Is exactly the same as the above-mentioned embodiment, and this system can also operate in the same manner as the above-mentioned embodiment.

The present invention is not limited to the above-described embodiment, but can be applied to a ring piston having three or more stages, and various changes can be made without departing from the scope of the present invention. Of course, etc.

[Effects of the Invention] As described above, according to the position detecting device of the ring piston incorporated in the rolling mill roll of the present invention, the moving rod configured to move integrally with the inner ring piston is used as the outer ring piston. Since the movement of the moving rod is detected by the inner piston position detection sensor provided in the seal ring, the position of the inner ring piston in the roll axis direction can be directly detected outside. Therefore, an excellent effect that the roll profile can be controlled with higher accuracy can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory sectional view showing an embodiment of the present invention, and FIG. 2 is an explanatory sectional view showing another embodiment of the present invention. 1 is a roll core, 2 is a sleeve, 3 is a tapered surface, 4 is an inner ring piston, 5 is an outer ring piston, 7 is a seal ring, 11 is a moving rod, 12 and 12 'are heads, 13 is a pressing spring, 15 Is a ring plate, 19 is an inner piston position detection sensor, and 21 is a connecting groove.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication location B21B 37/00 BBH (72) Inventor Masao Futanda Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawajima Harima Heavy Industries Co., Ltd. Company Yokohama 2nd Factory (72) Inventor Tsukasa Otani 1 Shinshinarahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama 2nd Factory

Claims (1)

[Claims] 1. A liquid-tight chamber formed by a roll core, a sleeve fitted to the roll core, and a seal ring provided between the roll core and the outer end of the sleeve, in a roll axial direction. In a device in which a plurality of movable ring pistons are inserted into the outer ring piston, a moving rod adapted to move in the roll axis direction integrally with the inner ring piston is provided through the outer ring piston, and A position detecting device for a ring piston incorporated in a roll for a rolling mill, wherein an inner piston position detecting sensor for detecting a roll axial position of the moving rod is provided in the seal ring.